Sparrow, the ridiculously popular email app for Mac and iPhone, is set to receive the iPad treatment in the very near future. When visiting the Sparrow homepage, you're now greeted with the cryptic message "We are preparing something bigger". When you sign up for an email update, an iPad slides in to view, sporting the Sparrow app icon. A larger, native iPad version of Sparrow is something that many an iOS user has been clamoring for, and it's nice to see the company has heard those cries. Now, if they can just get push working...